Mid-Late Game

Late Game

The best would be catherine & ringo, due to the extra stun & the lane freezing abilities. The natural slow from roam krul could also be utilised with joule's rocket leap, but this comp requires a strong independant laner, such as adagio, but this is only advised if the adagio is good. If not just stick with catherine, joule, ringo.

This is when you are vulnerable. The tip "always face your enemy and dont run" is most important here when vsing a wp jungler. Joule is most effective against blackfeather & glaive at the start, you might want to jungle invade if you're up against them, & you have a goos roam. If your roam is catherine, you might even want to jungle invade against a krul, but as soon as their laner disappears from mini map, disengage (unless your laner comes to help aswell)

There's not much to say here, only that you this is a good time to start jungle invading, especially with a catherine. If the enemy laner is on 50% health go for a lane gank, with a catherine ofcourse. It is said that in joules description that she reauires good predictive skills, but the stun from catherine just negates that. Your laner should have frozen the lane (best lane freezer is ringo) and if so thats and easy kill.

This is when joule is most strongest. You should really consider lane ganking, but if you fail just stay in bushes and try again. This should attract the attention of enemy jungler & roamer, and this just set you up for a triple kill with your bad *** ult.

This is when your opponents catvh up to you. This is also the reason why you should have a ringo on your team, since he excels at late game (when carried through mid game)
Remember, keep facing you opponents in a teamfight.

But more importantly, joule's A is the perfect ambush stun, its an AoE, long ranged stun, with a small delay. Use this to its full effect in teamfights, since usually the roam & jungler will target one hero and thats just a wombo combo double stun right there. But this doesnt mean you should always go for quantity over quality. Sometimes you have to go for the laner, which is (most of the time) the game changing decision.

Aegis can be replaced but shouldnt be if u got a good roam

If you got a good catherine that builds aftershock over contraption then this comp should work.

Broken myth can be replaced with tyrants monocle/tornado trigger, really good tactic when enemy builds shield